Merge Rather than Delete Duplicate Releases

The UUIDs that have been referenced anywhere (tagged files, links to MusicBrainz from other sites) will become invalid when the item is deleted. When merging it, however, the old UUIDs will forward to the new item. Note: Not yet implemented, see ticket 912

This MergeRatherThanDelete guideline also applies to artists, but since a RemoveArtistEdit is not possible for an artist with any releases, tracks or NonAlbumTracks it is more of a system-enforced rule than a guideline. An analogous guideline is to MergeMisspelledArtists.

However, pay close attention to DeleteRatherThanMerge when dealing with the common "feat artist" problem.